diff --git a/examples/all_example/EchoServer.cpp b/examples/all_example/EchoServer.cpp
index 7a8a4db..e6b2da3 100644
--- a/examples/all_example/EchoServer.cpp
+++ b/examples/all_example/EchoServer.cpp
@@ -57,11 +57,8 @@ void EchoServer::newMessage(shared_ptr<TcpConnection> connection,const char* buf
         {
             packetbuf->append(buf, static_cast<int>(size));
             //循环读取buffer
-            std::string data("");
-            while (0 == packetbuf->readPacket(data))
+            while (0 == packetbuf->readPacket(packet))
             {
-                packet.swap(data);
-                data.clear();
                 std::cout << "reserve data "<< packet.DataSize()<<":" << packet.getData() << std::endl;
                 connection->write(packet.Buffer().c_str(), packet.PacketSize(), nullptr);
             }
diff --git a/examples/pingpang/Clinet.h b/examples/pingpang/Clinet.h
index 9207367..624197e 100644
--- a/examples/pingpang/Clinet.h
+++ b/examples/pingpang/Clinet.h
@@ -73,11 +73,10 @@ class Client : public uv::TcpClient
             if (nullptr != packetbuf)
             {
                 packetbuf->append(buf, static_cast<int>(size));
-                std::string packet;
+                uv::Packet packet;
                 while (0 == packetbuf->readPacket(packet))
                 {
-                    write(packet.c_str(), (unsigned)packet.size(), nullptr);
-                    packet.clear();
+                    write(packet.Buffer().c_str(), (unsigned)packet.PacketSize(), nullptr);
                 }
             }
         }
diff --git a/examples/pingpang/EchoServer.cpp b/examples/pingpang/EchoServer.cpp
index 0ab991d..1ad1241 100644
--- a/examples/pingpang/EchoServer.cpp
+++ b/examples/pingpang/EchoServer.cpp
@@ -29,11 +29,10 @@ void EchoServer::newMessage(shared_ptr<TcpConnection> connection, const char* bu
         {
             packetbuf->append(buf, static_cast<int>(size));
             //循环读取buffer
-            std::string out;
-            while (0 == packetbuf->readPacket(out))
+            Packet packet;
+            while (0 == packetbuf->readPacket(packet))
             {   
-                connection->write(out.c_str(), out.size(), nullptr);
-                out.clear();
+                connection->write(packet.Buffer().c_str(), packet.PacketSize(), nullptr);
             }
         }
     }
diff --git a/uv/GlobalConfig.cpp b/uv/GlobalConfig.cpp
index ef9fbdd..c10cbfc 100644
--- a/uv/GlobalConfig.cpp
+++ b/uv/GlobalConfig.cpp
@@ -22,4 +22,6 @@ GlobalConfig::BufferMode GlobalConfig::BufferModeStatus = GlobalConfig::BufferMo
 uint64_t   GlobalConfig::CycleBufferSize = 1024 << 5;
 
 //默认包解析函数
-ReadBufferFunc GlobalConfig::ReadBufCallback = std::bind(&Packet::readFromBuffer, placeholders::_1, placeholders::_2);
+ReadBufferStringFunc GlobalConfig::ReadBufferString = nullptr;
+ReadBufferPacketFunc GlobalConfig::ReadBufferPacket = std::bind(&Packet::readFromBuffer, placeholders::_1, placeholders::_2);;
+ReadBufferVoidFunc GlobalConfig::ReadBufferVoid = nullptr;
diff --git a/uv/GlobalConfig.h b/uv/GlobalConfig.h
index 818ca4d..654eea8 100644
--- a/uv/GlobalConfig.h
+++ b/uv/GlobalConfig.h
@@ -16,7 +16,10 @@
 namespace uv
 {
 class PacketBuffer;
-using ReadBufferFunc = std::function<int(PacketBuffer*, std::string&)>;
+class Packet;
+using ReadBufferStringFunc = std::function<int(PacketBuffer*, std::string&)>;
+using ReadBufferPacketFunc = std::function<int(PacketBuffer*, Packet&)>;
+using ReadBufferVoidFunc = std::function<int(PacketBuffer*, void*)>;
 
 class GlobalConfig
 {
@@ -29,7 +32,11 @@ class GlobalConfig
     };
     static BufferMode BufferModeStatus;
     static uint64_t   CycleBufferSize;
-    static ReadBufferFunc ReadBufCallback;
+
+
+    static ReadBufferStringFunc ReadBufferString;
+    static ReadBufferPacketFunc ReadBufferPacket;
+    static ReadBufferVoidFunc ReadBufferVoid;
 };
 }
 #endif
diff --git a/uv/Packet.cpp b/uv/Packet.cpp
index ed6f028..6997655 100644
--- a/uv/Packet.cpp
+++ b/uv/Packet.cpp
@@ -29,11 +29,11 @@ uv::Packet::~Packet()
 
 }
 
-int uv::Packet::readFromBuffer(PacketBuffer* packetbuf, std::string& out)
+int uv::Packet::readFromBuffer(PacketBuffer* packetbuf, Packet& out)
 {
+    std::string data("");
     while (true)
     {
-        out.clear();
         auto size = packetbuf->readSize();
         //数据小于包头大小
         if (size < PacketMinSize())
@@ -42,30 +42,30 @@ int uv::Packet::readFromBuffer(PacketBuffer* packetbuf, std::string& out)
         }
         //找包头
         uint16_t dataSize;
-        packetbuf->readBufferN(out, sizeof(dataSize)+1);
-        if ((uint8_t)out[0] != HeadByte) //包头不正确，从下一个字节开始继续找
+        packetbuf->readBufferN(data, sizeof(dataSize)+1);
+        if ((uint8_t)data[0] != HeadByte) //包头不正确，从下一个字节开始继续找
         {
-            out.clear();
+            data.clear();
             packetbuf->clearBufferN(1);
             continue;
         }
-        UnpackNum((uint8_t*)out.c_str() + 1, dataSize);
+        UnpackNum((uint8_t*)data.c_str() + 1, dataSize);
         uint16_t msgsize = dataSize + PacketMinSize();
         //包不完整
         if (size < msgsize)
         {
-            out.clear();
             return -1;
         }
         packetbuf->clearBufferN(sizeof(dataSize)+1);
-        packetbuf->readBufferN(out, dataSize +1);
+        packetbuf->readBufferN(data, dataSize +1);
         //检查包尾
-        if ((uint8_t)out.back() == EndByte)
+        if ((uint8_t)data.back() == EndByte)
         {
             packetbuf->clearBufferN(dataSize +1);
             break;
         }
     }
+    out.swap(data);
     return 0;
 }
 
diff --git a/uv/Packet.h b/uv/Packet.h
index 9c45235..a68956a 100644
--- a/uv/Packet.h
+++ b/uv/Packet.h
@@ -28,7 +28,7 @@ class Packet
     Packet();
     ~Packet();
 
-    static int readFromBuffer(PacketBuffer*, std::string&);
+    static int readFromBuffer(PacketBuffer*, Packet&);
 
     void pack(const char* data, uint16_t size);
 
diff --git a/uv/PacketBuffer.h b/uv/PacketBuffer.h
index d8352c5..e36c343 100644
--- a/uv/PacketBuffer.h
+++ b/uv/PacketBuffer.h
@@ -20,7 +20,7 @@ Description: https://github.com/wlgq2/uv-cpp
 
 namespace uv
 {
-
+class Packet;
 class PacketBuffer
 {
 
@@ -33,10 +33,26 @@ class PacketBuffer
     virtual int clear() = 0;
     virtual uint64_t readSize() = 0;
 
-    int readPacket(std::string& data)
+    int readString(std::string& out)
+    {
+        if (nullptr != GlobalConfig::ReadBufferString)
+            return GlobalConfig::ReadBufferString(this, out);
+        uv::LogWriter::Instance()->error("not defined packet parse func.");
+        return -1;
+    }
+
+    int readPacket(Packet& out)
+    {
+        if (nullptr != GlobalConfig::ReadBufferPacket)
+            return GlobalConfig::ReadBufferPacket(this, out);
+        uv::LogWriter::Instance()->error("not defined packet parse func.");
+        return -1;
+    }
+
+    int readGeneric(void* out)
     {
-        if (nullptr != GlobalConfig::ReadBufCallback)
-            return GlobalConfig::ReadBufCallback(this, data);
+        if (nullptr != GlobalConfig::ReadBufferVoid)
+            return GlobalConfig::ReadBufferVoid(this, out);
         uv::LogWriter::Instance()->error("not defined packet parse func.");
         return -1;
     }
diff --git a/uv/uv11.h b/uv/uv11.h
index 24701f2..301d040 100644
--- a/uv/uv11.h
+++ b/uv/uv11.h
@@ -11,7 +11,7 @@
 #ifndef UV_UV11_H
 #define UV_UV11_H
 
-#define    UV_CPP_VERSION     "1.3.0"
+#define    UV_CPP_VERSION     "1.3.1"
 
 #include   "Async.h"
 #include   "Signal.h"